This example shows a blank visualization scaffold created with React and D3 v6, rendered as SVG. The reusable `VizContainer` component abstracts SVG and group elements while following the margin convention, displaying gray outer and inner rectangles to visualize the layout boundaries. The code uses React 16 and ReactDOM to render the component, with dimensions and margins defined as constants. The `showMargins` prop toggles the debug rectangles, and the inner group is translated by the margin values to position content correctly.